Suggestions/Recommendations with CPLD's and Software

Although it's possible to do things in ISE with schematics, you would probably be far better off using Verilog or VHDL.

i.e. specify the behaviour of the circuit rather than try to directly emulate existing TTL.

Cheers

PeteS

I can recommend Altera's Quartus software, which has libraries for 7400 series parts.

Then you're missing something. True, the Xilinx library isn't listed in terms of 74XX TTL, but all of the functions are there. Lessee - I've got a schematic up on the other computer right now ... In schematic design mode, the symbol library has 13 categories: Arithmetic, Buffer, Comparator, Counter, Decoder, Flip_Flop, General, IO, Latch, Mux, Shift_Register, and Shifter. Under "buffer", for example, there's buf, buf16, buf4, buf8, bufe, bufe16, and so on a total of 15 different variations on "buffer". You'd have to pop it up and look at the symbols (or maybe RTFM) to figure out which function you need in a particular place.

They also have some excellent tutorials, e.g.:

Good Luck! Rich

In article , Henry wrote: [...]

I'd suggest that you learn VHDL and descibe what the whole thing is supposed to do in VHDL. It is likely to be no faster on this project because it will include the learning time but on the next project it will save you a bunch of time.

The other thought is why not just make it SMT versions of the thru-hole stuff? .. or how about using a couple of 22V10s

Cypress's development tools are less nasty than Xilinx's.

Altera's Quartus, at last report, had a few bugs but works well enough.

I'm not naming names, but the one that's in front of me at the moment is so bad as to be quite funny, when I stop chewing the carpet.

They all seem to be a ragbag of odds and sods, carefully designed to hang when you're in a hurry, and make you jump through nearly as many hoops as VHDL does.

Still, I didn't pay much for it, and it's not open source, so I can't complain.

Paul Burke

In article , Paul Burke wrote: [...]

Yes, you can complain. It just won't do you any bloody good.